WO2016129158A1 - Endoscope - Google Patents

Endoscope Download PDF

Info

Publication number
WO2016129158A1
WO2016129158A1 PCT/JP2015/082212 JP2015082212W WO2016129158A1 WO 2016129158 A1 WO2016129158 A1 WO 2016129158A1 JP 2015082212 W JP2015082212 W JP 2015082212W WO 2016129158 A1 WO2016129158 A1 WO 2016129158A1
Authority
WO
WIPO (PCT)
Prior art keywords
illumination
light guide
illumination lens
endoscope
lens
Prior art date
Application number
PCT/JP2015/082212
Other languages
English (en)
Japanese (ja)
Inventor
野口あずさ
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to CN201580065940.1A priority Critical patent/CN106998998B/zh
Priority to JP2016550292A priority patent/JP6043039B1/ja
Priority to EP15882032.4A priority patent/EP3257426A4/fr
Publication of WO2016129158A1 publication Critical patent/WO2016129158A1/fr
Priority to US15/673,373 priority patent/US10111579B2/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2461—Illumination
    • G02B23/2469—Illumination using optical fibres
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G02B23/243—Objectives for endoscopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476—Non-optical details, e.g. housings, mountings, supports
    • G02B23/2484—Arrangements in relation to a camera or imaging device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2476—Non-optical details, e.g. housings, mountings, supports
    • G02B23/2492—Arrangements for use in a hostile environment, e.g. a very hot, cold or radioactive environment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides

Definitions

  • the present invention relates to an endoscope.
  • the endoscope is a device that is widely used in the medical field and the industrial field.
  • images of various parts in a body cavity can be obtained by an endoscope inserted into the body cavity.
  • An observation site is diagnosed using this image.
  • the endoscope is used for observation and diagnosis of various parts in the body cavity.
  • an imaging system and an illumination system are built into the distal end of an insertion portion inserted into the body.
  • the imaging system takes out the image information of the illuminated observation site as a video signal and displays the image on the monitor.
  • the illumination system illuminates the observation range.
  • the light guide is accommodated in the internal space penetrating from the distal end portion to the proximal end portion in the insertion portion.
  • the light guide is configured, for example, by bundling a large number of optical fibers. Illumination light is incident on one end (incident end) of the light guide from an external light source device, the illumination light is guided to the tip, and is emitted from the other end (exit end) of the light guide. Illumination light from the exit end is irradiated toward the observation site through the illumination optical system.
  • a medical endoscope Since a medical endoscope is used in the body, it needs to be configured so that the temperature of the outer surface of the insertion portion does not increase.
  • elements constituting the distal end portion of the endoscope examples of elements that contribute to heat generation at the distal end portion include an imaging element and an illumination system.
  • an illumination lens that spreads the light beam is disposed on the exit end side of the light guide.
  • the light emitted from the light guide has an NA (numerical aperture) determined according to the material of the light guide. Since the light emitted from the light guide is refracted according to the radius of curvature of the illumination lens, a light beam having a large angle out of the light emitted from the outer periphery of the light guide enters the side surface (rim portion) of the illumination lens.
  • the side surface of the illumination lens is processed into a grain shape, the light beam is scattered and absorbed on the side surface of the illumination lens. The absorbed light contributes to the temperature rise as energy.
  • the side surface of the illumination lens is processed into a mirror surface, the light beam is scattered and absorbed by the lens frame, and thus contributes to an increase in temperature. If the radius of curvature of the illumination lens is decreased in order to broaden the light distribution, the amount of light hitting the side surface increases, and the amount of heat generation increases.
  • Patent Documents 1 and 2 Such a configuration for reducing heat generation at the distal end portion of the endoscope is proposed in, for example, Patent Documents 1 and 2.
  • a rod rod is used as the illumination lens. This increases the lens diameter at the tip.
  • the lens surface on the exit side of the illumination lens has a shape having positive power, that is, a shape having a convex surface facing the object side.
  • Patent Document 1 has a disadvantage that the cost increases because a rod is used.
  • Patent Document 2 since the exit side surface of the illumination lens has a convex shape, foreign matter is likely to be attached, and removal of the attached foreign matter is difficult. Further, if the exit side of the illumination lens is convex, the tip of the lens is easily damaged. Therefore, there is a problem that the illumination light is scattered and absorbed by the scratch, thereby causing a loss of the illumination light and leading to heat generation at the tip.
  • the aspect ratio of the monitor screen has become the mainstream of 16: 9 landscape.
  • the screen shape of the endoscope displayed on the monitor is also 16: 9 or a horizontally long shape close thereto.
  • the endoscope screen is horizontally long, the difference between the vertical and horizontal angles of view increases.
  • the vertical angle of view which is the short side
  • the horizontal angle of view becomes wider than before.
  • the brightness of the entire screen needs to be uniform to some extent in order to observe without oversight with an endoscope.
  • the same illumination system having a conventional aspect ratio of 4: 3 is applied to an observation system with a horizontally long screen, the peripheral part in the horizontal direction with a wide angle of view becomes dark, which hinders observation.
  • Patent Documents 3 and 4 Such a configuration for appropriately illuminating a horizontally long region is proposed in Patent Documents 3 and 4, for example.
  • the illumination optical system for endoscopes of Patent Document 3 has two sets of illumination systems, and each decenters the illumination lens and the light guide in different directions. Thereby, a horizontally long light distribution characteristic is obtained.
  • the curvature radius of the illumination lens is anamorphic. Processing such a lens may be difficult and costly. Moreover, since it has an anamorphic shape, a structure for aligning the rotation direction when assembling the lens is required.
  • Patent Document 4 proposes a configuration in which the light guide has a different shape in order to make the imaging range of the observation optical system substantially coincide with the illumination range of the illumination optical system.
  • Patent Documents 3 and 4 make no mention of reducing the heat generation at the endoscope tip.
  • the present invention has been made in view of such problems, and an object thereof is to provide an endoscope in which heat generation at the distal end portion is reduced.
  • an endoscope includes: An imaging system and an illumination system;
  • the illumination system includes a light guide and at least one illumination lens,
  • the imaging system has an objective lens unit and an imaging device,
  • the direction along the long side of the image sensor is the first direction,
  • the illumination system is arranged at a position shifted in the second direction with respect to the imaging system, The following conditional expressions (1) and (2) are satisfied.
  • A H / V L H is a dimension corresponding to the first direction of the end surface of the light guide on the side of the illumination lens, L V, the dimensions corresponding to the second direction of the end face of the illumination lens side of the light guide, It is.
  • FIG. 1 It is a figure showing a schematic structure of an endoscope system which has an endoscope concerning an embodiment of the present invention. It is a figure showing the section composition of the tip part of the endoscope concerning a 1st embodiment of the present invention. It is a figure explaining the endoscope concerning a 1st embodiment of the present invention. It is a figure explaining the endoscope concerning a 2nd embodiment of the present invention. It is a figure explaining the endoscope concerning a 3rd embodiment of the present invention. It is a figure explaining the endoscope concerning a 4th embodiment of the present invention. It is a figure explaining the endoscope concerning a 5th embodiment of the present invention. It is a figure explaining the endoscope concerning a 6th embodiment of the present invention.
  • An endoscope includes: An imaging system and an illumination system;
  • the illumination system includes a light guide and at least one illumination lens,
  • the imaging system has an objective lens unit and an imaging device,
  • the direction along the long side of the image sensor is the first direction,
  • the illumination system is arranged at a position shifted in the second direction with respect to the imaging system, The following conditional expressions (1) and (2) are satisfied.
  • A H / V L H is a dimension corresponding to the first direction of the end surface of the light guide on the side of the illumination lens, L V, the dimensions corresponding to the second direction of the end face of the illumination lens side of the light guide, It is.
  • Conditional expression (1) defines an appropriate aspect ratio (aspect ratio) of the area of the image sensor corresponding to the display image range.
  • An image picked up by the image pickup device is displayed on the image display unit via the image processing unit.
  • An image displayed on the image display unit is referred to as a “display image”.
  • the following (1), (2), and (3) are mentioned.
  • (1) When an image obtained from the effective imaging area of the image sensor is displayed as it is on the image display unit, it is referred to as an “aspect ratio of the effective imaging area”.
  • H and V are described as parameters for defining the “screen aspect ratio”.
  • reference symbols H and V denote display images in the first direction (long side direction) and the second direction (short side direction), respectively.
  • the relative value (unit: none) of the area of the image sensor corresponding to the range is shown.
  • Conditional expression (2) defines an appropriate shape of the end surface of the light guide on the side of the illumination lens.
  • the second direction (short side direction) is larger than the first direction (long side direction) in the dimension of the light guide. Becomes smaller. For this reason, light does not enter the side surface of the illumination lens in the second direction (short-side direction).
  • tip part of an endoscope can be reduced.
  • the illumination system is preferably arranged at a position shifted in the second direction with respect to the imaging system. More preferably, the position of the illumination lens of the illumination system is shifted in the second direction with respect to the position of the objective lens unit of the imaging system. That is, when the endoscope is viewed from the distal direction, if the number of illumination systems is one set, the endoscope is disposed at one position in the second direction with respect to the imaging system. When the number of illumination systems is two sets, the illumination system includes a first position with respect to the imaging system and a second position on the opposite side with respect to the imaging system in the second direction. It is desirable that the illumination system is disposed only at any one of the positions, or the illumination system is disposed at both the first position and the second position.
  • the tip of the endoscope is generally composed of a frame made of a material such as metal. Since the illumination system is arranged in the second direction, which is the direction along the short side direction of the image display range, with respect to the imaging system, the thickness of the frame in the second direction is thinner than the illumination system. In this aspect, the heat generation in the second direction, which is the short side direction with respect to the screen of the imaging system, can be reduced. Therefore, with respect to the second direction, even if the frame is thin, the amount of heat generation is small, so the temperature does not rise easily, and as a result, the temperature rise on the outer surface of the endoscope can be reduced.
  • organs are often arranged in the lower direction of the screen and observed from obliquely upward.
  • the illumination system By disposing the illumination system with respect to the imaging system in the upward direction of the screen, for example, at the first position, the illumination system can be easily separated from the subject. As a result, insufficient brightness due to halation or dimming is less likely to occur.
  • L H is a dimension corresponding to the first direction of the end surface of the light guide on the side of the illumination lens
  • L V the dimensions corresponding to the second direction of the end face of the illumination lens side of the light guide
  • r H is the outer diameter dimension corresponding to the first direction of the illumination lens
  • r V is the outer diameter dimension corresponding to the second direction of the illumination lens
  • Conditional expression (3) defines an appropriate ratio of the difference between the outer diameter size of the illumination lens and the cross-sectional size of the light guide in the first direction and the second direction.
  • the conditional expression (3) is satisfied, the light incident on the side surface of the illumination lens can be reduced, and the heat generation amount can be effectively reduced.
  • the illumination lens is composed of a plurality of lenses, the outer dimension of the illumination lens is the outer dimension of the lens closest to the object (observed object).
  • L H is a dimension corresponding to the first direction of the end surface of the light guide on the side of the illumination lens
  • L V the dimensions corresponding to the second direction of the end face of the illumination lens side of the light guide
  • the light emitted from the periphery of the light guide has a direction toward the outer periphery of the light guide and a direction toward the center of the light guide.
  • the light beam directed toward the center of the light guide is refracted by the illumination lens to illuminate the vicinity of the center of the screen. For this reason, if the dimension in the second direction is too small, the amount of light in the central portion is reduced and the overall brightness is lowered. If the upper limit value of conditional expression (4) is exceeded, the central light quantity will be significantly reduced and the overall brightness will be reduced, degrading the observation performance.
  • FIG. 1 is a diagram showing a schematic configuration of an electronic endoscope system 10 having an endoscope according to an embodiment of the present invention.
  • the electronic endoscope system 10 includes an electronic endoscope 4 and an in vitro device 7.
  • the electronic endoscope 4 includes an insertion portion 3, an operation portion 2, a connection cord portion 5, and a connector portion 6.
  • the extracorporeal device 7 includes a power supply device, a video processor (not shown) that processes a video signal from the electronic endoscope 4, and a display unit 8 that monitors and displays the video signal from the video processor.
  • the insertion portion 3 is an elongated and flexible member that can be inserted into the body cavity of a patient, and the distal end portion is a rigid distal rigid portion 1.
  • a user (not shown) can perform various operations using an angle knob or the like provided in the operation unit 2.
  • connection cord portion 5 is extended from the operation portion 2.
  • the connection cord portion 5 is connected to the in vitro device 7 via the connector portion 6.
  • the connection cord unit 5 communicates a power supply voltage signal from a power supply device or a video processor, a drive signal from an image sensor, and the like to an imaging system (not shown) built in the distal end rigid unit 1 and from the imaging system.
  • the video signal is communicated to the video processor.
  • the video processor in the in-vitro device 7 can be connected to peripheral devices (not shown) such as a video printer and a recording device.
  • the video processor can perform predetermined signal processing on the video signal from the imaging system and display an endoscopic image on the display screen (monitor) of the display unit 8.
  • the electronic endoscope 4 of the present embodiment is not limited to the configuration in which the insertion portion 3 has flexibility.
  • a rigid endoscope in which the insertion portion 3 is not bent may be used.
  • FIG. 2 shows a cross-sectional configuration in the direction (z direction) along the optical axis of the distal end portion of the endoscope 100 according to the first embodiment.
  • This embodiment is an example suitable for a rigid endoscope, for example.
  • the endoscope 100 includes an imaging system 104 and an illumination system 103.
  • the present embodiment has two sets of illumination systems 103.
  • the first illumination system includes a light guide 102a and one illumination lens 101a.
  • the second illumination system includes a light guide 102b and one illumination lens 101b.
  • the imaging system 104 includes an objective lens unit LU and an imaging element 105.
  • the objective lens unit LU has four lenses LS1, LS2, LS3, and LS4.
  • the image sensor 105 is, for example, a CCD.
  • a signal for driving the image sensor 105 and a signal output from the image sensor 105 are input and output by a signal cable 106.
  • FIG. 3A shows a configuration of the endoscope 100 viewed from the distal direction (z direction).
  • FIG. 3B shows a configuration in which the light guide 102a and the illumination lens 101a are viewed from the front end direction (z direction).
  • FIGS. 3C and 3D respectively show cross-sectional configurations of the light guide 102a and the illumination lens 101a in two different directions along the central axis AX.
  • the endoscope 100 satisfies the following conditional expressions (1) and (2).
  • the direction along the long side of the image sensor 105 is the first direction
  • a direction along the short side of the image sensor 105 is defined as a second direction.
  • Dimensions L V is corresponding to the second direction of the end face of the illumination lens 101a (101b) side of the light guide 102a (102b) (y-direction), It is.
  • the area of the image sensor 105 corresponding to the display image range is rectangular.
  • the aspect ratio of the area of the image sensor 105 corresponding to the display image range satisfies the conditional expression (1). Thereby, it is possible to take an image of a horizontally long screen equivalent to the aspect ratio of the screen of the monitor which is the display unit 8 (FIG. 1).
  • the light guide 102a and the light guide 102b satisfy the conditional expression (2).
  • the end surfaces of the light guide 102a and the light guide 102b on the side of the illumination lens 101a and the illumination lens 101b are horizontally long.
  • FIG. 3E shows an observation area 107a and an illuminated area (range of light distribution characteristics) 108.
  • a horizontally elongated illumination range (range of light distribution characteristics) 108 can be obtained with respect to the horizontally long observation region 107a.
  • the dimensions H ′ and V ′ of the observation area 107a are approximately proportional to the relative dimensions H and V of the area of the image sensor 105 corresponding to the display image range.
  • the light A emitted from the light guide 102a (102b) in the second direction (y direction) may hit the side surface of the illumination lens 101a (101b), that is, the rim portion. Absent. Therefore, it is possible to reduce the generation of heat energy on the side surface of the illumination lens and prevent the temperature from rising.
  • the endoscope 100 is further described based on FIG.
  • the illumination lens 101a and the illumination lens 101b are each disposed at a position P1 shifted in the second direction (y direction) with respect to the imaging system 104. That is, the illumination lens 101a and the illumination lens 101b are a first position P1 with respect to the imaging system 104, and the first position P1 is a second position opposite to the imaging system 104 in the second direction (y direction). It is arranged only at one position P1 of P2 (not shown).
  • the two illumination lenses 101a and 101b are each arranged only at the first position P1. Since the first position P1 is the upward direction on the screen of the imaging system 104, the observation area can be illuminated from above the screen by this configuration.
  • the cross-sectional shape perpendicular to the central axis AX of the light guides 102a and 102b is an oval shape in which two portions in the second direction (y direction) are cut into a straight line out of a circular shape.
  • One of the cutting directions is opposed to the circumferential portion of the endoscope 100.
  • the illumination lenses 101a and 101b are plano-concave lenses having a circular outer diameter and a flat object side surface.
  • the concave surface has a rotationally symmetric shape.
  • two sets of illumination systems are arranged in the upper direction (second direction, y direction) of the screen of the imaging system 104.
  • the dimensions of the light guide are shorter in the short side direction (second direction, y direction) than in the long side direction (first direction, x direction). And small. Note that, in the cross section shown in FIG. 3 (d), a light ray hits the side surface of the illumination lens, as in the prior art.
  • light is not incident on the side surfaces of the illumination lenses 101a and 101b or the amount of incident light is small in a region of about 2/3 of the outer peripheral portion of the illumination lens in the short side direction (second direction, y direction). Because of the reduction, the amount of heat generated at the tip can be reduced.
  • the tip of the endoscope is made up of a metal frame. Since the illumination lens is disposed on the screen of the imaging system, the thickness of the metal frame in the upward direction of the illumination system is reduced. In the present embodiment, heat generation in the upper and lower directions (second direction) of the screen of the illumination system can be reduced. For this reason, it is difficult for the temperature of the metal frame to rise, and the temperature rise of the outer surface of the endoscope can be reduced.
  • an organ to be observed is often arranged in the lower direction of the screen and observed from an obliquely upward direction.
  • the illumination system 103 By disposing the illumination system 103 in the upward direction (first position P1) with respect to the imaging system, the illumination system 103 is often separated from the subject. Thereby, insufficient brightness due to halation or dimming can be prevented.
  • the illumination lens 101a and the illumination lens 101b are circular, workability is good.
  • the illumination lens 101a and the illumination lens 101b are made of sapphire. Thereby, autoclave (high temperature and high humidity sterilization) is possible.
  • the curved surface of the illumination lens is a rotationally symmetric spherical shape and the outer diameter is circular, processing is possible even with a hard glass material such as sapphire.
  • the first illumination system includes an illumination lens 101a and a light guide 102a.
  • the second illumination system includes an illumination lens 101b and a light guide 102b. Since the dimensions of the illumination lens 101a and the illumination lens 101b in the first direction and the second direction are the same, they are described as outer diameter dimensions.
  • FIG. 4 shows a cross-sectional configuration viewed from the direction (z direction) along the optical axis of the distal end portion of the endoscope 200 according to the second embodiment.
  • This embodiment is an example suitable for an endoscope having flexibility.
  • the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the endoscope 200 includes an imaging system 104 and an illumination system 103 (see FIG. 2).
  • the present embodiment has two sets of illumination systems 103.
  • the first illumination system includes a light guide 202a and one illumination lens 201a.
  • the second illumination system includes a light guide 202b and one illumination lens 201b.
  • the imaging system 104 includes an objective lens unit LU (see FIG. 2) and an imaging element 105.
  • the treatment instrument insertion channel passes through the endoscope from the distal end rigid portion 1 to the operation portion 2.
  • FIG. 4A shows a configuration of the endoscope 200 viewed from the distal direction (z direction).
  • FIG. 4B shows a configuration in which the light guide 202a and the illumination lens 201a are viewed from the front end direction (z direction).
  • 4C and 4D show cross-sectional configurations in two different directions along the central axis AX, respectively, for the light guide 202a and the illumination lens 201a.
  • the light guide 202a and the light guide 202b satisfy the conditional expression (2).
  • the shape of the end surface of each of the light guide 202a and the light guide 202b on the side of the illumination lens 201a and the illumination lens 201b is a horizontally long rectangular shape.
  • the endoscope 200 will be further described.
  • there are two sets of illumination systems a first illumination system and a second illumination system.
  • the illumination lens 201a and the illumination lens 201b are disposed at positions shifted in the second direction (y direction) with respect to the imaging system 104.
  • the illumination lens 201a and the illumination lens 201b are a first position P1 with respect to the imaging system 104, and a second position opposite to the imaging system 104 in the second direction (y direction) from the first position P1. It is arranged at both positions P1 and P2 of P2 (not shown).
  • the illumination lens 101a and the illumination lens 101b are disposed at the first position P1 and the second position P2, respectively. With this configuration, when observing, the observation area can be illuminated from above and below the screen.
  • the shape of the cross section perpendicular to the central axis AX of the light guides 202a and 202b is a rectangular shape.
  • the outer diameters of the illumination lenses 201a and 201b are circular.
  • the object side surfaces of the illumination lenses 201a and 201b are planoconvex lenses.
  • the convex surface has a rotationally symmetric shape.
  • the distal end layout of the endoscope 200 is such that the illumination system includes the first illumination system and the second illumination system in the upper and lower screen directions (second direction, y direction) of the imaging system 104. 2 sets are arranged.
  • the dimension of the light guide is smaller in the short side direction (second direction, y direction) than in the long side direction (first direction, x direction). For this reason, light does not enter the side surfaces of the illumination lens 201a and the illumination lens 201b. As a result, the calorific value can be reduced.
  • a light ray hits the side surface of the illumination lens, as in the prior art.
  • the distal end portion of the endoscope is composed of a metal frame. Since the illumination lens is arranged in the upper and lower directions (second direction, y direction) of the screen of the imaging system, the thickness of the metal frame in the upper direction of the illumination lens 201a and the lower direction of the illumination lens 201b is reduced. In the present embodiment, heat generation in the upper and lower directions of the illumination system can be reduced. For this reason, it is difficult for the temperature of the metal frame to rise, and the temperature rise of the outer surface of the endoscope can be reduced. Although heat is generated in the left and right directions (first direction, x direction) of the screen, the metal frame is thick, so that the temperature is not easily transmitted to the outside, which is not a problem.
  • the first illumination system includes an illumination lens 201a and a light guide 202a.
  • the second illumination system includes an illumination lens 201b and a light guide 202b. Since the dimensions of the illumination lens 201a and the illumination lens 201b in the first direction and the second direction are the same, they are described as outer diameter dimensions.
  • FIG. 5 shows a cross-sectional configuration as viewed from the direction (z direction) along the optical axis of the distal end portion of the endoscope 300 according to the third embodiment.
  • This embodiment is an example suitable for an endoscope having flexibility.
  • the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the endoscope 300 includes an imaging system 104 and an illumination system 103 (see FIG. 2).
  • the present embodiment has two sets of illumination systems 103.
  • the first illumination system includes a light guide 302a and an illumination lens 301a including three lenses.
  • the second illumination system includes a light guide 302b and an illumination lens 301b including three lenses. Note that the configuration of the illumination lens 301b including the three lenses is the same as that of the illumination lens 301a, and is not shown in the figure because it overlaps.
  • the imaging system 104 includes an objective lens unit LU (see FIG. 2) and an imaging element 105.
  • the treatment instrument insertion channel is an endoscope from the distal end rigid portion 1 to the operation portion 2, and an air / water feeding tube is disposed from the distal end rigid portion 1 to the connector portion 6. Is inserted.
  • FIG. 5A shows a configuration of the endoscope 300 viewed from the distal direction (z direction).
  • FIG. 5B shows a configuration in which the light guide 302a and the illumination lens 301a are viewed from the front end direction (z direction).
  • FIGS. 5D and 5E respectively show cross-sectional configurations of the light guide 302a and the illumination lens 301a in two different directions along the central axis AX.
  • the light guide 302a satisfies the conditional expression (2).
  • the shape of the end surface of the light guide 302a on the side of the illumination lens 301a is a horizontally long shape.
  • the shape of the light guide 302b on the side of the illumination lens 301b is a circular shape.
  • the endoscope 300 has a nozzle 303 for air supply / water supply.
  • the endoscope 300 will be further described based on FIG.
  • there are two sets of illumination systems a first illumination system and a second illumination system.
  • the illumination lens 301a is disposed at a position P2 shifted in the second direction (y direction) with respect to the imaging system 104.
  • the shape of the cross section perpendicular to the central axis AX of the light guide 302a is an oval shape in which two places in the second direction (y direction) are cut into a straight line out of a circular shape. One of the cutting directions is opposed to the circumference of the endoscope 300.
  • the illumination lens 301a and the illumination lens 301b each have a circular outer diameter.
  • the illumination lens 301a is composed of three lenses in order from the object side: a plano-convex positive lens, a biconvex positive lens, and a convex plano-positive lens.
  • the convex surface has a rotationally symmetric shape.
  • the illumination lens 301b also has the same lens configuration as the illumination lens 301a.
  • the first illumination system including the light guide 302a is arranged in the lower screen direction of the imaging system 104, and the second layout including the light guide 302b in the left direction of the screen.
  • An illumination system is arranged.
  • the dimension of the light guide 302a is smaller in the short side direction (second direction, y direction) than in the long side direction (first direction, x direction). For this reason, light does not enter the side surface of the illumination lens 301a. As a result, the amount of heat generated in this direction can be reduced.
  • the light ray strikes the side surface of the illumination lens, as in the prior art.
  • the distal end portion of the endoscope is composed of a metal frame. Since the illumination lens 301a is arranged in the lower direction of the screen of the imaging system, the thickness of the metal frame in the lower direction of the illumination system is reduced. In this aspect, the heat generation in the screen vertical direction (second direction) of the illumination system can be reduced. For this reason, it is difficult for the temperature of the metal frame to rise, and the temperature rise of the outer surface of the endoscope can be reduced. Although heat is generated in the left-right direction of the screen (first direction, x-direction), there is no problem because the metal frame is thick and the temperature is not easily transmitted to the outside.
  • the short side direction (second direction, y direction) in the cross section of the light guide 302a tip are smaller than the dimensions in the long side direction (first direction, x direction).
  • the light guide 302a having a larger diameter has a higher influence on heat generation than the diameter of the light guide 302b. For this reason, heat generation can be effectively reduced by making the diameter of the light guide 302a oval.
  • the cross-sectional shape of the light guide 302b having a small number of optical fibers is circular. Since the diameter of the light guide 302b is small, the amount of heat generated is also small.
  • the first illumination system includes an illumination lens 301a and a light guide 302a.
  • the second illumination system includes an illumination lens 301b and a light guide 302b. Since the dimensions of the illumination lens 301a and the illumination lens 301b in the first direction and the second direction are the same, they are described as outer diameter dimensions.
  • FIG. 6 shows a cross-sectional configuration as viewed from the direction (z direction) along the optical axis of the distal end portion of the endoscope 400 according to the fourth embodiment.
  • the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the endoscope 400 includes an imaging system 104 and an illumination system 103 (see FIG. 2).
  • the present embodiment has two sets of illumination systems 103.
  • the first illumination system includes a light guide 402a and an illumination lens 401a including three lenses.
  • the second illumination system includes a light guide 402b and an illumination lens 401b including three lenses.
  • FIG. 6A shows a configuration of the endoscope 400 viewed from the distal direction (z direction).
  • FIG. 6B shows a configuration in which the light guide 402a and the illumination lens 401a are viewed from the front end direction (z direction).
  • FIG. 6C shows a configuration in which the light guide 402b and the illumination lens 401b are viewed from the front end direction (z direction).
  • 6D and 6E show cross-sectional configurations of the light guide 402a and the illumination lens 401a in two different directions along the central axis AX.
  • the light guide 402a and the light guide 402b satisfy the conditional expression (2).
  • the shape of the end surface of each of the light guide 402a and the light guide 402b on the side of the illumination lens 401a and the illumination lens 401b is a so-called D-cut shape in which a part of the circle is notched.
  • the cutting direction is opposed to the circumference of the endoscope 400.
  • the endoscope 400 of the present embodiment has a nozzle 303 for air supply / water supply.
  • the endoscope 400 will be further described based on FIG.
  • there are two sets of illumination systems a first illumination system and a second illumination system.
  • the illumination lens 401a and the illumination lens 401b are disposed at positions P2 and P1 that are shifted in the second direction (y direction) with respect to the imaging system 104, respectively. That is, the illumination lens 401 a and the illumination lens 401 b are on the opposite side with respect to the imaging system 104 in the first position P 1 (not shown) with respect to the imaging system 104 and the first position P 1 in the second direction (y direction). They are arranged at both positions P1 and P2 of the second position P2 (not shown).
  • the shape of the cross section perpendicular to the central axis AX of the light guide 402a is a D-cut shape in which the lower direction is cut linearly with respect to the screen of the imaging system in the second direction (y direction) out of the circular shape.
  • the shape of the cross section perpendicular to the central axis AX of the light guide 402b is a D-cut shape in which the upper direction is linearly cut with respect to the screen of the imaging system in the second direction (y direction) among the circular shapes.
  • the configuration is advantageous in terms of brightness because heat generation can be reduced and a decrease in the overall light amount can be reduced.
  • the illumination lens 401a and the illumination lens 401b each have a circular outer diameter.
  • the illumination lens 401a is composed of three lenses in order from the object side: a plano-convex positive lens, a biconvex positive lens, and a convex plano-positive lens.
  • the convex surface has a rotationally symmetric shape.
  • the illumination lens 401b also has the same lens configuration as the illumination lens 401a.
  • two sets of illumination systems are arranged in the upper and lower directions (second direction, y direction) of the imaging system 104.
  • the dimension of the light guide 402a is smaller in the short side direction (second direction, y direction) than in the long side direction (first direction, x direction). For this reason, light does not enter the lower side of FIG. 6D among the side surfaces of the illumination lens 401a. As a result, the calorific value can be reduced.
  • the light ray hits the side surface of the illumination lens 401a as in the prior art.
  • the distal end portion of the endoscope is composed of a metal frame. Since the illumination lens is arranged on the screen of the imaging system, the thickness of the metal frame on the lower side of the illumination lens 401a and the upper side of the illumination lens 401b is reduced. In the illumination system of this embodiment, heat generation on the lower side of the illumination lens 401a and the upper side (second direction) of the illumination lens 401b can be reduced with the screen as a reference. For this reason, it is difficult for the temperature of the metal frame to rise, and the temperature rise of the outer surface of the endoscope can be reduced. In addition, although there is heat generation on the left / right direction (first direction, x direction) of the screen and the lens side on the side where the light guide is not D-cut, the temperature is difficult to be transmitted to the outside because the metal frame is thick. Must not.
  • the cross-sectional shape of the light guides 402a and 402b is a rectangular shape, a shape obtained by cutting the top and bottom of a circular shape, or a shape obtained by cutting one side, a horizontally long ellipse Any shape such as a shape or a horizontally long polygon may be used.
  • the outer diameter shape of the illumination lens can also be an elliptical shape or a rectangular shape in accordance with the cross-sectional layout of the endoscope 400.
  • the first illumination system includes an illumination lens 401a and a light guide 402a.
  • the second illumination system includes an illumination lens 401b and a light guide 402b. Since the dimensions of the illumination lens 401a and the illumination lens 401b in the first direction and the second direction are the same, they are described as outer diameter dimensions.
  • FIG. 7 shows a cross-sectional configuration viewed from the direction (z direction) along the optical axis of the distal end portion of the endoscope 500 according to the fifth embodiment.
  • this is an example suitable for a flexible endoscope.
  • the same parts as those in the fourth embodiment are denoted by the same reference numerals, and redundant description is omitted.
  • the light guide 502b is formed by cutting two portions facing the outer peripheral direction of the distal end of the endoscope 500 obliquely.
  • FIG. 7B shows the cross-sectional shape of the end face of the light guide 502b.
  • the endoscope 500 has the same configuration as the endoscope 400 of the fourth embodiment except that the shape of the light guide 502b is different.
  • the light guide 502b cuts a portion facing the outer peripheral direction of the distal end of the endoscope 500 obliquely. For this reason, the heat generation amount in the outer diameter direction is reduced, and the temperature rise at the distal end portion of the endoscope 500 can be further reduced.
  • the upper direction (second direction, y direction) is not cut with respect to the screen of the light guide 402a of the first illumination system. For this reason, the illumination light from the light guide 402a is illuminated in the upward direction (second direction, y direction) with respect to the screen. For this reason, the light distribution characteristics of the present embodiment can be obtained with no hindrance during observation with an endoscope.
  • the second illumination system includes an illumination lens 501b and a light guide 502b. Since the dimensions of the illumination lens 501b in the first direction and the second direction are the same, they are described as outer diameter dimensions.
  • FIG. 8 shows a cross-sectional configuration viewed from the direction (z direction) along the optical axis of the distal end portion of the endoscope 600 according to the sixth embodiment.
  • this is an example suitable for a flexible endoscope.
  • the same parts as those in the above-described embodiments are denoted by the same reference numerals, and redundant description is omitted.
  • the endoscope 600 includes an imaging system 104 and an illumination system 103 (FIG. 2). This embodiment has one set of illumination systems 103.
  • One set of illumination systems includes a light guide 602 and one illumination lens 601.
  • the cross-sectional shape perpendicular to the central axis AX of the light guide 602 is an oval shape in which two locations in the second direction (y direction) are cut into a straight line out of a circular shape.
  • One of the cutting directions faces the circumferential portion of the endoscope 600.
  • the illumination lens 601 is a plano-convex lens having a circular outer diameter and a flat object side surface.
  • the convex surface has a rotationally symmetric shape.
  • the light guide 601 cuts a portion of the distal end of the endoscope 600 facing the outer periphery in a straight line. For this reason, the heat generation amount in the outer diameter direction is reduced, and the temperature rise at the distal end portion of the endoscope 600 can be reduced.
  • the metal frame is thick, so that it is difficult to transmit the temperature to the outside of the scope.
  • the number of illumination systems is one set or two sets.
  • the present invention is not limited to this, and the number of illumination systems may be three sets or more.
  • the present invention is useful for an endoscope in which heat generation at the distal end portion is reduced.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • Surgery (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Multimedia (AREA)
  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Abstract

La présente invention concerne un endoscope ayant une extrémité de pointe dans laquelle la génération de chaleur est réduite. L'endoscope comprend un système d'imagerie (104) et un système d'éclairage (103), le système d'éclairage (103) comprenant des guides de lumière (102a, 102b) et au moins plus d'une lentille d'éclairage (101a, 101b) et le système d'imagerie (104) comprenant une unité de lentille d'objectif (LU) et un élément d'imagerie (105). Lorsqu'une direction le long d'un côté long de l'élément d'imagerie (105) est une première direction et qu'une direction le long d'un côté court de l'élément d'imagerie (105) est une seconde direction, le système d'éclairage (103) est disposé dans une position décalée vers la seconde direction par rapport au système d'imagerie (104) et des expressions conditionnelles (1) 1,35 < A et (2) 1 < LH/LV sont satisfaites, où A est un rapport d'aspect de la région de l'élément d'imagerie qui correspond à une plage d'image d'affichage, LH est la taille qui correspond à la première direction d'une surface d'extrémité du guide de lumière (102a, 102b) sur un côté de la lentille d'éclairage (101a, 101b), et LV est la taille qui correspond à la seconde direction de la surface d'extrémité du guide de lumière (102a, 102b) sur le côté de la lentille d'éclairage (101a, 101b).
PCT/JP2015/082212 2015-02-09 2015-11-17 Endoscope WO2016129158A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201580065940.1A CN106998998B (zh) 2015-02-09 2015-11-17 内窥镜
JP2016550292A JP6043039B1 (ja) 2015-02-09 2015-11-17 内視鏡
EP15882032.4A EP3257426A4 (fr) 2015-02-09 2015-11-17 Endoscope
US15/673,373 US10111579B2 (en) 2015-02-09 2017-08-09 Endoscope having an illumination system shifted with respect to an imaging system to reduce generation of heat at a front-end portion of the endoscope

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015022961 2015-02-09
JP2015-022961 2015-02-09

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/673,373 Continuation US10111579B2 (en) 2015-02-09 2017-08-09 Endoscope having an illumination system shifted with respect to an imaging system to reduce generation of heat at a front-end portion of the endoscope

Publications (1)

Publication Number Publication Date
WO2016129158A1 true WO2016129158A1 (fr) 2016-08-18

Family

ID=56615148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/082212 WO2016129158A1 (fr) 2015-02-09 2015-11-17 Endoscope

Country Status (5)

Country Link
US (1) US10111579B2 (fr)
EP (1) EP3257426A4 (fr)
JP (1) JP6043039B1 (fr)
CN (1) CN106998998B (fr)
WO (1) WO2016129158A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102234910B1 (ko) * 2019-05-28 2021-04-01 김윤관 부동액 주입용 건

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292956A (ja) * 2000-04-17 2001-10-23 Olympus Optical Co Ltd 内視鏡照明光学系

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2544519C3 (de) * 1974-10-08 1981-03-12 Olympus Optical Co., Ltd., Tokyo Beleuchtungsvorrichtung für Endoskope
JPS62287215A (ja) * 1986-06-06 1987-12-14 Olympus Optical Co Ltd 内視鏡照明光学系装置
JPH08254659A (ja) 1995-03-17 1996-10-01 Olympus Optical Co Ltd 撮像装置
JPH11326786A (ja) * 1999-02-19 1999-11-26 Olympus Optical Co Ltd 電子内視鏡に用いられる照明光学系
JP2001166223A (ja) * 1999-12-03 2001-06-22 Olympus Optical Co Ltd 内視鏡
US7477458B2 (en) * 2004-07-15 2009-01-13 Olympus Corporation Illumination optical system
FR2923026B1 (fr) * 2007-10-31 2011-02-18 Tokendo Dispositif d'eclairage pour videoendoscope
JP5330180B2 (ja) * 2009-10-02 2013-10-30 オリンパス株式会社 内視鏡装置
JP2011215425A (ja) 2010-03-31 2011-10-27 Fujifilm Corp 照明レンズ及び該照明レンズを備えた内視鏡
JP5345171B2 (ja) 2011-03-28 2013-11-20 富士フイルム株式会社 内視鏡
CN103354727B (zh) * 2011-10-12 2015-08-26 奥林巴斯医疗株式会社 内窥镜
JP6280683B2 (ja) * 2012-01-23 2018-02-14 オリンパス株式会社 管状観察装置
JP5715308B2 (ja) * 2013-02-20 2015-05-07 オリンパスメディカルシステムズ株式会社 内視鏡装置
JP5891208B2 (ja) * 2013-08-13 2016-03-22 Hoya株式会社 内視鏡用照明光学系
WO2015122487A1 (fr) * 2014-02-13 2015-08-20 オリンパス株式会社 Dispositif d'insertion
EP3243422A4 (fr) * 2015-01-28 2018-10-31 Olympus Corporation Endoscope
EP3919976A1 (fr) * 2015-08-24 2021-12-08 Titan Medical Inc. Procédé et appareil d'éclairage d'un champ d'objet photographié à l'aide d'un capteur d'image rectangulaire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001292956A (ja) * 2000-04-17 2001-10-23 Olympus Optical Co Ltd 内視鏡照明光学系

Also Published As

Publication number Publication date
JPWO2016129158A1 (ja) 2017-04-27
US20170367568A1 (en) 2017-12-28
CN106998998A (zh) 2017-08-01
EP3257426A4 (fr) 2018-12-05
CN106998998B (zh) 2018-12-07
US10111579B2 (en) 2018-10-30
JP6043039B1 (ja) 2016-12-14
EP3257426A1 (fr) 2017-12-20

Similar Documents

Publication Publication Date Title
US11543646B2 (en) Optical systems for multi-sensor endoscopes
JP5274719B2 (ja) 内視鏡及び内視鏡用照明装置
JP4782900B2 (ja) 内視鏡
JPH10239594A (ja) 電子内視鏡
US20190086657A1 (en) Oblique viewing endoscope and imaging system
JP6043039B1 (ja) 内視鏡
CN104224092B (zh) 内窥镜先端部结构
US10602041B2 (en) Image capturing device
US20200333580A1 (en) Image pickup optical system, endoscope, and image pickup apparatus
JP2006061438A (ja) カプセル型内視鏡
JP2009136386A (ja) 撮像レンズ及びカプセル内視鏡
JP4147037B2 (ja) 照明システムおよびそれを有する内視鏡
JPH1176148A (ja) 内視鏡
WO2018143218A1 (fr) Endoscope
CN218922543U (zh) 一种视角可变的电子关节镜组件
JP6501995B1 (ja) 撮像光学系及び内視鏡
US20230161147A1 (en) Optical systems for multi-sensor endoscopes
JP2013094259A (ja) 内視鏡
US11213192B2 (en) Endoscope device and method with illumination fiber bundles having multiple numerical apertures
CN210055965U (zh) 一种广角型电子膀胱镜照明镜头
WO2022176197A1 (fr) Endoscope et système d&#39;endoscope
WO2013035522A1 (fr) Endoscope
US20220395167A1 (en) Front-end structure for insertion part of endoscope
JP2003167203A (ja) 内視鏡装置
CN116407060A (zh) 物镜模组、内窥镜及内窥镜成像设备

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref document number: 2016550292

Country of ref document: JP

Kind code of ref document: A

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15882032

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2015882032

Country of ref document: EP